Gary Willis – bassist, composer, educator, author
Willis’ career includes 5 solo CD’s, 10 as co-leader of Tribal Tech as well as playing and recording with Wayne Shorter, Alan Holdsworth, Dennis Chambers and many others. His contributions to the instrument include innovative approaches to technique as well as instrument design and continue with the development of this app as a new kind of learning experience.

Willis endorses Ibanez basses, Aguilar amps, D’Addario strings, Bartolini pickups and Roland electronics.

Gergo Borlai – drummer, composer, producer, clinician
Currently rocking the collective drummers’ world with his clinic and festival appearances for Gretsch drums, Gergo started playing at the age of 3. He’s played on over 150 recordings and also contributed as arranger and music director. His unique and intense style draws on a wide range of influences. In addition to recording with Willis on his latest two releases Retro and Larger Than Life, he’s performed with Scott Henderson, Matthew Garrison, Scott Kinsey Group, Tim Lefebvre, Steve Tavaglione, Scott Kinsey, Walt Fowler, Bob Mintzer, Hiram Bullock, L. Shankar, Vernon Reid, Iain Ballamy, Al DiMeola, Nguyen Lee, Hadrien Feraud.

Gergo Borlai endorses Gretsch, Paiste, Remo, Vic Firth, Drum Workshop, Slapklatz and Dunnett Snares.

Jeppe Rasmussen – video producer, saxophonist and inventor
After studying music at the conservatory the Hague, Netherlands, he moved to Barcelona where he first developed his vfx / animation style and a keen understanding for camera work while making several music videos for the rapper Welelo, as well as publicity and event videos for Consumedia and lanostratelevisió.
More recently he has created and produced animation projects for companies such as InfoJobs, Atta and ADM Promotions. On Groove A Day, he is the sole octopus in charge of the 6 cameras and dolly, as well as the motorized rail, which is his own design.
As a musician, you can mostly hear him with the Ramon Diaz Trio, where he plays the saxophones as well as the OHMs (Open Horn MIDI system), an open source wind instrument MIDI controller of his own making.

Oleg Langer – app developer, Musician.  After studying Media Technologies at the University of Applied Sciences, Düsselorf, Germany, Oleg dedicated himself to Mobile Applications Development. His other passion is music. He plays bass and guitar and is an enthusicastic music listener and discoverer.